System for controlling unpolarized electromagnetic radiation
US6873381B2 · kind B2 · utility
0Cited by
9References
1Claims
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Key dates
| Filing date | Jan 23, 2004 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Jan 23, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light controlling film is described comprising a polymerized polymer network of a crosslinked high molecular weight polymeric material and a low molecular weight cholesteric liquid crystal (CLC) material, wherein the high molecular weight and the low molecular weight form a material having cholesteric liquid crystal (CLC) order such that the film is a reflective circular polarizer whose bandwidth is controllable by an electric field impressed in the film.
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